Hi ,Let the radius of a SEMICIRCLE = r cmPerimeter of the semicircle = π r + 2rP = 36r( π + 2 ) = 36r ( 22/7 + 2 ) = 36r ( 22 + 14 )/7(36/7)r = 36r = ( 36 × 7 )/36r = 7 cmArea of the semicircle = π r²/2A = ( 22/7 ) × 7 × 7/2A = ( 22 × 7 ) /2A = 11 × 7A = 77 cm²I HOPE this helps you.: )
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